北京林业大学学报2025，Vol.47Issue(9)：46-56,11.DOI:10.12171/j.1000-1522.20250202
宁夏罗山5种典型林型多维度植物多样性及群落构建过程
Multidimensional plant diversity and community construction process of five typical forest types in Luo Mountain,Ningxia of northwestern China
摘要
Abstract
[Objective]This paper aims to explore the changes and associations of multidimensional diversity of forest plants in Luo Mountain,Ningxia of northwestern China,and reveal the dominant drivers of community construction.[Method]Five typical forest communities were studied,including Picea crassifolia pure forest,Picea crassifolia×Pinus tabuliformis mixed forest,Pinus tabuliformis pure forest,Pinus tabuliformis×Populus davidiana mixed forest,and Populus davidiana pure forest.This study employed multidimensional indices of biodiversity combined with functional traits and environmental factors,and systematically analyzed the correlations among multidimensional diversity and community construction processes.[Result](1)Species diversity(Simpson index,Margalef richness index)and functional diversity of Picea crassifolia pure forest were significantly lower than those of mixed forests(P<0.05),while there was no significant difference in phylogenetic diversity among different forest types(P>0.05).(2)Species diversity index was significantly positively correlated with functional diversity index and phylogenetic diversity index,respectively(P<0.05),while there was no correlation between functional and phylogenetic diversity(P>0.05).(3)Picea crassifolia and Pinus tabuliformis pure forest exhibited divergent phylogenetic and functional trait structure,indicating community construction dominated by competitive exclusion.Picea crassifolia×Pinus tabuliformis mixed forest showed local aggregation with overall divergence in phylogenetic structure,and Pinus tabuliformis×Populus davidiana mixed forest showed local aggregation with overall divergence in functional trait structure,which both suggested community construction co-driven by competitive exclusion and environmental filtering.Populus davidiana pure forest displayed aggregated phylogenetic and functional trait structure,indicating community construction dominated by environmental filtering.(4)The phylogenetic signals of seven leaf functional traits were all less than 1,indicating inconsistency between functional traits and phylogenetic structure and their variations were mainly driven by environmental heterogeneity.Altitude,soil pH,organic carbon,and total nitrogen were identified as the key environmental factors affecting functional trait differentiation.[Conclusion]Species diversity is positively correlated with functional diversity and phylogenetic diversity,while functional traits show a decoupled relationship with phylogeny in Luo Mountain,Ningxia of northwestern China.Community construction process is primarily governed by niche theory,with dominant drivers varying among different forest types.Specifically,pure coniferous forest is dominated by competitive exclusion,pure broadleaved forest is dominated by environmental filtering,and mixed forests are co-driven by these two processes.关键词
宁夏罗山/多维多样性/群落构建/功能性状/环境因子Key words
Luo Mountain in Ningxia/multidimensional diversity/community construction/functional traits/environmental factor分类
农业科技引用本文复制引用
郭邵华,杨天宇,兰少伟,李春霞,徐雪蕾,杨君珑..宁夏罗山5种典型林型多维度植物多样性及群落构建过程[J].北京林业大学学报,2025,47(9):46-56,11.基金项目
国家自然科学基金项目(32260421),宁夏青年科技托举人才培养项目. （32260421）
